৮২৮২
If the nth term of an arithmetic progression is 7n + 1, then what is the common difference?
উত্তর
7
৮২৮৩
A boat travels 18 km downstream in 45 minutes. If the speed of the stream is 5 km/h, what is the speed of the boat in still water?
উত্তর
19 km/h
৮২৮৪
If 5x + y = 25 and 5x - y = 5, then what are the values of x and y respectively?
উত্তর
3/2, 1/2
৮২৮৫
The present ages of A and B are in the ratio 3 : 5. After 10 years, the ratio of their ages will be 4 : 6. What is the difference in their present ages?
উত্তর
20 years
৮২৮৬
P scored 30% marks and failed by 15 marks. Q scored 45% marks and obtained 30 marks more than the pass marks. What is the pass percentage?
উত্তর
35%
৮২৮৭
A train 150 meters long takes 40 seconds to cross a 350-meter-long bridge. How much time will the train take to cross a 250-meter-long platform?
উত্তর
32 seconds
৮২৮৮
A man buys an article for 25% more than its value and sells it for 20% less than its value. His gain or loss percentage is –
উত্তর
36% loss
৮২৮৯
The supplement of an angle exceeds twice the angle by 30°. Then the angle is equal to-
উত্তর
50°
৮২৯০
In a 500 m race, the speeds of two runners, A and B are in the ratio 5 : 6. If A is given a start of 100m, by how many meters does A win the race?
উত্তর
20 meters