L.C.M. of 4 and 6 = 12. Hence the number assign to the students who play cricket as well as football is divisible by 12. Number divisible by 12 are 12, 24, 36. Total number of such Numbers up to 100 = 8. and that are 12, 24, 36, 48, 60, 72, 84, 96. Hence required number = 8