self Maths Puzzle

WHY 2 PLUS 2 IS 4 IS CAN IT BE 5.

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self Other Question

12 children take 16 days to complete a work which can be completed by 8 adults in 12 days. 16 adults started working and after 3 days 10 adults left and 4 children joined them. How many days will it take them to complete the remaining work?
option
(a) 6
(b) 8
(c) 4
(d) 3
A man wafts to reach up a window 40 ft. from the ground. The distance from the foot of the ladder to the wall is 9 feet. How long should the ladder be?