How to match inequealities with number lines

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

The verbal translation for the difference of m and 7 increased by 15

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?