50% of the people in an area read Ittefaq and 60% of the people in that area read Prothom Alo. 20% people read both the newspapers. What percent of people do not read any of the newspapers?

১

A book had a catalogue price of Tk. 400. It was sold at a discount of 15%. If the book had a cost of Tk. 200, what was the percentage of profit?

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

উত্তর

সমাধান

Selling Price = 400 - 400×15100 = 340tkCost Price = 200tkprofit = 340 - 200 = 140tkpercentage of profit = 140×100200 = 70 (Ans.)

২

The total of 10 number is 462; the average of the first 4 numbers is 52; the average of the last 5 numbers is 38. What is the fifth number?

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

The total of the first 4 numbers = 4×52 = 208 The total of the last 5 numbers = 5×38 = 190 The total of the (4 + 5 = 9) numbers = 208 + 190 = 398 So, the fifth number = 462 - 398 = 64

৩

The average of five consecutive average number is 61. What is the difference between the highest and lowest number?

None of these

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

Let, number be x, x + 2, x + 4, x + 6, and x + 8 Then ( x + x + 2 + x + 4 + x + 6 + x + 8)5 = 61 5x + 20 = 305 x = 57

৪

The least perfect square,which is divisible by each 21, 36 and 66 is -

213444

214344

214434

231444

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

213444

সমাধান

L.C.M of 21, 36, 66 = 2×2×3×3×7×11 = 2772 To make it a perfect square , it must be multiplied by. 7 × 11 So, required number = 22× 32×72×112 = 213444

৫

What is the eight term of the sequence 1, 4, 9, 16, 25,....,....,.....?

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

This is a square number sequence, so the eighth term will be 82 =64

৬

A boy multiplied 423 by a number and obtained 65589 as his answer. If both the fives in the answer are wrong and all other figures are correct, the correct answer is-

60489

62189

61189

62389

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

60489

সমাধান

Obeservation of the results tell us that the multiplier should end with a 3 o as ( 3×3) = 9 and should be between 140 and 160 as ( 423 × 160) = 67680 The possible multiplicants thoufare are 143, 153, and 163 while trying to multiply 153, and 163 don't give 89 as the last 2 digit Multiply 423 to arrive to 60489

৭

The average of six numbers is 6. If 3 is subtracted from each of the numbers, what is the new average?

1.5

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

Sum of 6 numbers are = 6*6 = 36After subtracting 3 from each of the numbers, the new 6 numbers are = 36 - 6*3 = 18the new average = 18/6 = 3 (Ans)

৮

The least number of 5 digits which is exactly divisible by 12, 15, and 18 is -

10010

10015

10020

10080

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

10080

সমাধান

12, 15, 18 L.C.M = 2×2×3×5×3 = 180 Least no. of 5 digis = 10000 Remainder = 100 Least number = 10000 + ( 180 - 100) = 10080

৯

A vertical pole 6 feet high casts a shadow 4 feet long. At the same time a tree cast a shadow 64 feet long. What is the length, in feet, of the trees?

192

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

Let, length of the trees = X feetas per condition, 64 = X64 X = 96So, the length of the tree = 96 feet (Ans)

১০

A hostel spends Tk. 3200 as cost of rice 20 students for 30 days. If they spend Tk. 2400 for 30 students, for how many days will the rice last?

25 days

30 days

15 days

5 days

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

15 days

সমাধান

৩২০০ টাকায় ২০ জন ছাত্রের খাবার আছে = ৩০ দিনের৩২০০ টাকায় ১ জন ছাত্রের খাবার আছে = ৩০*২০ দিনের৩২০০ টাকায় ৩০ জন ছাত্রের খাবার আছে = 30×2030 দিনের২৪০০ টাকায় ৩০ জন ছাত্রের খাবার আছে = 30×20×240030×3200দিনের = ১৫ দিনের (উত্তর)

অনুসন্ধান করুন

বিস্তারিত সমাধান

50% of the people in an area read Ittefaq and 60% of the people in that area read Prothom Alo. 20% people read both the newspapers. What percent of people do not read any of the newspapers?

A book had a catalogue price of Tk. 400. It was sold at a discount of 15%. If the book had a cost of Tk. 200, what was the percentage of profit?

The total of 10 number is 462; the average of the first 4 numbers is 52; the average of the last 5 numbers is 38. What is the fifth number?

The average of five consecutive average number is 61. What is the difference between the highest and lowest number?

The least perfect square,which is divisible by each 21, 36 and 66 is -

What is the eight term of the sequence 1, 4, 9, 16, 25,....,....,.....?

A boy multiplied 423 by a number and obtained 65589 as his answer. If both the fives in the answer are wrong and all other figures are correct, the correct answer is-

The average of six numbers is 6. If 3 is subtracted from each of the numbers, what is the new average?

The least number of 5 digits which is exactly divisible by 12, 15, and 18 is -

A vertical pole 6 feet high casts a shadow 4 feet long. At the same time a tree cast a shadow 64 feet long. What is the length, in feet, of the trees?

A hostel spends Tk. 3200 as cost of rice 20 students for 30 days. If they spend Tk. 2400 for 30 students, for how many days will the rice last?

কোর্স

অনুসন্ধান করুন

বিস্তারিত সমাধান

50% of the people in an area read Ittefaq and 60% of the people in that area read Prothom Alo. 20% people read both the newspapers. What percent of people do not read any of the newspapers?

সম্পর্কিত বিষয় সমূহ

সম্পর্কিত অন্যান্য প্রশ্ন

A book had a catalogue price of Tk. 400. It was sold at a discount of 15%. If the book had a cost of Tk. 200, what was the percentage of profit?

The total of 10 number is 462; the average of the first 4 numbers is 52; the average of the last 5 numbers is 38. What is the fifth number?

The average of five consecutive average number is 61. What is the difference between the highest and lowest number?

The least perfect square,which is divisible by each 21, 36 and 66 is -

What is the eight term of the sequence 1, 4, 9, 16, 25,....,....,.....?

A boy multiplied 423 by a number and obtained 65589 as his answer. If both the fives in the answer are wrong and all other figures are correct, the correct answer is-

The average of six numbers is 6. If 3 is subtracted from each of the numbers, what is the new average?

The least number of 5 digits which is exactly divisible by 12, 15, and 18 is -

A vertical pole 6 feet high casts a shadow 4 feet long. At the same time a tree cast a shadow 64 feet long. What is the length, in feet, of the trees?

A hostel spends Tk. 3200 as cost of rice 20 students for 30 days. If they spend Tk. 2400 for 30 students, for how many days will the rice last?