Plz
write each number as the sum of two triangle numbers, for example 16 = 1 + 15.
(a) 13
(b) 31
(c) 55

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these