(i) Write the odd numbers between 36 and 53.

(ii) Write the even numbers between 232 and 251.

(i) Write four consecutive odd numbers succeeding 79.

(ii) Write three consecutive even numbers preceding 124.

Which of the following numbers are prime?

(i) 29

(ii) 57

(iii) 43

(iv) 61

Which of the following pairs of numbers are co-prime?

(i) 12 and 35

(ii) 15 and 37

(iii) 27 and 32

(iv) 17 and 85

(v) 515 and 516

(vi) 215 and 415