Basic Maths Mcqs

Q.  The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. If the sum of the first and the last number is 13. What is the last numbers?

a. 8
b. 6
c. 5
d. 2


ANSWER: See Answer
 
A + B + C = 48

B + C + D = 45

A + D = 13

A – D = 3

A + D = 13

2D = 10

D = 5
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