Fast Thinkers in Mathematics

Find A, B & C

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Find x in the diagram below

The average age of a group of 12 students is 20 years. If 4 more students join the group the average age increases by 1 year . Find the average age of the 4 new students?

a. 24
b. 26
c. 23
d. 22
e. none of the above.

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How many days are in four straight years

Find x

First of all find the best sign that is used in the question and secondly find the numbers to replace each alphabet in the question.