A combination lock requires 3 numbers to unlock. The se... | Maths Class 5

Maths Class 5 Fractions

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

A combination lock requires 3 numbers to unlock. The second number is 2/5
of the first number. The third number is 3/4
of the second number. The difference between the first number and the third number is 42. What is the second number?

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A 60
B 24
C 14
D 34

2 answered 50% got it right