There are two lights.The first light blinks 3 times per minute while the other blinks 5 times in two minutes. Find the no. of times they will blink together in an hour

20

30

60

None of these

Correct Answer : B

A number exceeds its four seventh by 18. What is the number

If m and n (n > 1) are whole numbers, such that mn = 121, the value of (m – 1)n + 1 is

Five sixth of a number is more than 30% of another number by 25. What is the ratio of the first number to the second number