Can anyone me solve these pronlems?

a. 15, 21 . it adds one more than the previous number added so, +1,+2,+3,+4... ext

b. 1/16, 1/32 . multiplied by 1/2

c. 81, 234 multiplied by 3

d. -2, -7 subtract one more than the previous number subtracted

e. 53, 58 subtract 2, then add 5 to the next, then subtract again, then add again

goog may have it for you

i think asking google will you get the answer to that question