Govt Exams
All numbers except 55 are multiples of 5 with a difference of 5. The difference before 55 is 10 instead of 5
A:B = 3:4 (multiply by 5) = 15:20. B:C = 5:6 (multiply by 4) = 20:24. So A:B:C = 15:20:24
Rate of A = 1/12, Rate of B = 1/15. Combined rate = 1/12 + 1/15 = 5/60 + 4/60 = 9/60 = 3/20. Time = 20/3 = 6.67 hours
Factors of 24: 1,2,3,4,6,8,12,24. Factors of 36: 1,2,3,4,6,9,12,18,36. GCD = 12
Let numbers be 3x and 4x. 3x + 4x = 70. 7x = 70. x = 10. Numbers are 30 and 40
Let number = x. 30% of x = 45. 0.30x = 45. x = 45/0.30 = 150
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