Question

Ranjan went to play with 60 marbles. In 8 games he gained
(5) marbles each and in 4 games he gained 4 marbles each
How many marbles did Ranjan have at the end?
8 A submarine moved from the water surface at a speed of
(-20) m per minute. How far is the submarine from the water
surface at the end of 7 minutes?
(Hint: Consider the water surface level as zero.)
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Answer 1

for the first 8 games he will get 40 marbles (5 in each win)... for the next 4 games he will get 16 marbles (4 in each win) so total no. of marbles= 60+ 40+ 16= 116