TCS Company Numerical Ability Algebra

Sudheer has certain number of toffees between 80 and 100 with him. If he distributes them equally among all his 4 children, there will be 3 left. If he distributes them equally among his wife and children, he is left with four toffees. If he decides to distribute the toffees amongst himself, his wife and children how many will be left over?

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TCS Other Question

assume that rate of consumption of coal by an engine varies as the square of the speed and is 1000 kg/hr when the speed is 60 km/hr.,when in motion. if the coal costs the railway company rs 15 per 100 kg and the other expenses of running the train is rs 12 per hour, find a formula for the cost in paise per km when the speed is s km per hour.
a)(1200/s)+(25s/6)
b)(1200/s)+(25s^2/6)
c)(1200/s)+(5s^2/18)
d)none
2 vehicles A and B leave from city Y to city X. A overtakes B at 10.30 am and reaches city X at 12 pm. it waits for 2 hrs and returns to city Y. on its way,it meets B at 3 pm and reaches city Y at 5 pm. B reaches city X,waits for 1 hr and return to city Y. after how many hours will B reach city Y from the time A overtook him for the first time ?
a)41.5
b)50
c)37.5
d)49.5