M4maths
Others Maths Puzzle

how to find the sum of series whose difference is in AP?
eg. 1, 3, 6, 10, 15, 21.....

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Others Other Question

Q2. A fair dice is thrown 6 times .
In how many different ways can we get sum of i) 31 ii) 30 ??
Two salesmen A and B together sold 30 pens. A sold all his pens at the same rate, so does B. Though A sold his pens at a
different rate than at a rate B sold, they both receive the same amount after selling all their pens. If A had sold his pens
at the rate at which B sold, he would have received Rs.320. If B had sold his pens at the rate at which A sold, he would
have received Rs.245. At what price did B sell each of his pens?