২২৭৩১
Increasing the original price of an item by 20% and then decreasing the price by 20% is equivalent to
উত্তর
4% decrease
সমাধান
here, first increase the original price 20%then decrease 20%original price decrease=20-20-(20*20)/100=4%
২২৭৩২
A set of 6 flower vases of different sizes cost Manik Tk. 825. Each vas costs Tk. 25 more than the next one below it in size. What was the cost of the largest vas?
উত্তর
Tk. 200
২২৭৩৩
A roast was cooked for 4 hours. The internal temperature of the roast rose from 32০ C to 145০ C. What was the average rise in temperature?
উত্তর
28.25০ C/hr
সমাধান
AVERAGE=145-324=28.250
২২৭৩৪
If the value of X and Y in the fraction X/Y are both doubled, how does the value of the fraction change?
উত্তর
remains the same
সমাধান
Let,x=3,y=2x/y=3/2if we double x & y, x/y=3×2/2×2=3/2the fraction remains unchanged
২২৭৩৫
If 4 times an integer x is increased by 10, the result is always greater than 10 and less than 34. What is the least value of x?
উত্তর
5
২২৭৩৬
If a coin is tossed once, what is the probability of getting a "HEAD"
উত্তর
0.5
সমাধান
A coin has two sides. So probability of head / tell is ½ or 0.5
২২৭৩৭
What is the next number in the series? 8, 11, 17, 24, 29, 53, 78...........
উত্তর
101
২২৭৩৮
An employee is entitled to 20% of his basic pay as dearness Allowance (DA). If his basic pay is Tk. 6300, what is total pay.
উত্তর
Tk. 7560
সমাধান
Total pay = 6300 + 20% of 6300 = 6300 + 1260 = 7560 TK
২২৭৩৯
How much is.01 X 0.01 X 0.001 =?
উত্তর
0.0000001
সমাধান
.01 X 0.01 X 0.001 =0.0000001
২২৭৪০
The price of an item changed from Tk. 120 to Tk. 100. Later, the price decreased again from Tk. 100 to Tk. 80 and finally the price decreased from Tk. 80 to Tk. 60. What oif the three decreases was larger in percentage term?
উত্তর
3rd decrease
সমাধান
1st decrease = (120 - 100)/120×100% = 16.67%
2nd decrease = (100 - 80)/100×100% = 20%
3rd decrease = (80 - 60)/80×100% = 25%
So, 3rd decrease was the largest.