Today is Ratuls 12th birthday and his fathers 40th birthday. How many years from today will Ratul's father be twice as old as Ratuls at that time?

১

If 10% of r is 20% of s. is 20% of s is 30% of t and 100% of r is x% of t, then x is ----

300

33.33

66.66

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

300

সমাধান

Here 0.1 × r = 0.2 × s = 0.3 × t r = 0.01 × x × t3 × t =0.01 × x × tSo, x = 300 (ans.)

২

A container full of water weighs 18.5 kg. If one -fourth of the container is full of water , it weighs 6.5 kg. What is the weight of the empty container?

2.5 kg

3 kg

2 kg

2.3 kg

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

2.5 kg

সমাধান

Weight of container + weight of totally filled water = 18.5 kg Weight of container + weight of 1/4 th filled water = 6.5 kg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - [Subtraction] Weight of the 3/4th [1 - 1/4 = 3/4] filled water = 18.5 - 6.5 = 12 kg So, weight of fully filled water = 12 x 4 / 3 = 16 kg Therefore, weight of the container = 18.5 - 16 = 2.5 kg

৩

If r=18 and r/s = 6/y, then y/s is ----

1/3

1/6

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

1/3

সমাধান

Here, r/s = 6/y or, y/s = 6/r So, y/s = 6/18 = 1/3 [r = 18]

৪

Mr. Jamal employed 50 workers to finish a work within 30 days. After 20 days he found out that only 50% work had been completed. How many additional workers did Mr. Jamal need to finish the work in time?

100

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

Remaining days = 30 - 20 = 10 days Remaining work = 100% - 50% = 50% Now, 50% work can be completed in 20 days by 50 workers So, 50% work can be completed in 10 days by 50 x 20 / 10 = 100 workers Therefore, additional workers needed = 100 - 50 = 50

৫

A retailer buys a Panjabi and a Fatua jointly at Tk. 500. If he sells the Fatua at 10% profit and the panjabi at 5% loss , then he gets, Tk. 520 as total sales price. What is the cost price of the Fatua?

Tk. 150

Tk. 200

Tk. 280

Tk. 300

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

Tk. 300

সমাধান

Let the cost price of the Fatua and the Panjabi be F and (500 - F) respectively. Now, total sales price, F + 10% of F + (500 - F) - 5% of (500 - F) = 520 or, F + 10/100 F + 500 - F - 5/100 of 500 + 5/100 of F = 520 or, F/10 + F/20 = 520 + 25 - 500 or, 3F/20 = 45 or, F = 45 x 20 / 3 = 300 TK

৬

If p number of pencils cost c paisa, how many pencils can be bought for taka?

100 pd/c

100 cd/p

10 cp/d

100 d/cp

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

100 pd/c

৭

In an examination of four subjects, a student got 70,80, 90 and x marks and his average was 75. What was the value of x?

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

Here, 70 + 80 + 90 + x = 4 x 75 or, x = 300 - 240 So, x = 60

৮

If the product of 4 consecutive integers is equal to one of them , then what is the largest possible value of one of the integers?

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

let,4 consecutive numbers are 0,1,2,3 Now lets take the product of them: 0 * 1 * 2 * 3 = 0 As we can see, it's equal to one of the integers which is 0 So that meets the requirement. From those set of numbers, 3 is the largest. (ans)

৯

Three times a number minus 7 is 32. What is the twice of the number?

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

Let the number be N. According to the question, 3N - 7 = 32 or, 3N = 32 + 7 = 39 So, N = 39/3 = 13 Therefore, twice of N or 2N = 2 x 13 = 26.

১০

If x% of y is 10, then what is y?

10/x

100/x

1000/x

x/100

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

1000/x

সমাধান

ATQ, x% of y = 10 or, xy/100 = 10 or, xy = 1000 or, y = 1000/x ans: 1000/x

অনুসন্ধান করুন

বিস্তারিত সমাধান

Today is Ratuls 12th birthday and his fathers 40th birthday. How many years from today will Ratul's father be twice as old as Ratuls at that time?

If 10% of r is 20% of s. is 20% of s is 30% of t and 100% of r is x% of t, then x is ----

A container full of water weighs 18.5 kg. If one -fourth of the container is full of water , it weighs 6.5 kg. What is the weight of the empty container?

If r=18 and r/s = 6/y, then y/s is ----

Mr. Jamal employed 50 workers to finish a work within 30 days. After 20 days he found out that only 50% work had been completed. How many additional workers did Mr. Jamal need to finish the work in time?

A retailer buys a Panjabi and a Fatua jointly at Tk. 500. If he sells the Fatua at 10% profit and the panjabi at 5% loss , then he gets, Tk. 520 as total sales price. What is the cost price of the Fatua?

If p number of pencils cost c paisa, how many pencils can be bought for taka?

In an examination of four subjects, a student got 70,80, 90 and x marks and his average was 75. What was the value of x?

If the product of 4 consecutive integers is equal to one of them , then what is the largest possible value of one of the integers?

Three times a number minus 7 is 32. What is the twice of the number?

If x% of y is 10, then what is y?

কোর্স

অনুসন্ধান করুন

বিস্তারিত সমাধান

Today is Ratuls 12th birthday and his fathers 40th birthday. How many years from today will Ratul's father be twice as old as Ratuls at that time?

সম্পর্কিত বিষয় সমূহ

সম্পর্কিত অন্যান্য প্রশ্ন

If 10% of r is 20% of s. is 20% of s is 30% of t and 100% of r is x% of t, then x is ----

A container full of water weighs 18.5 kg. If one -fourth of the container is full of water , it weighs 6.5 kg. What is the weight of the empty container?

If r=18 and r/s = 6/y, then y/s is ----

Mr. Jamal employed 50 workers to finish a work within 30 days. After 20 days he found out that only 50% work had been completed. How many additional workers did Mr. Jamal need to finish the work in time?

A retailer buys a Panjabi and a Fatua jointly at Tk. 500. If he sells the Fatua at 10% profit and the panjabi at 5% loss , then he gets, Tk. 520 as total sales price. What is the cost price of the Fatua?

If p number of pencils cost c paisa, how many pencils can be bought for taka?

In an examination of four subjects, a student got 70,80, 90 and x marks and his average was 75. What was the value of x?

If the product of 4 consecutive integers is equal to one of them , then what is the largest possible value of one of the integers?

Three times a number minus 7 is 32. What is the twice of the number?

If x% of y is 10, then what is y?