How many prime numbers between 1 and 100 are factors of 7,150 PS06498

[@stace6407e]

Hi @Quant Reasoning, do you have any tips on how to better recognize factors for more obscure numbers like 143?

[@QuantReasoning]

There's a rule you could memorize for checking divisibility by 11, but other than that there's no shortcut to factoring large numbers unfortunately. Here's a link if you'd like to memorize the rule for divisibility by 11 (but it's really not necessary for the GMAT):
www.cuemath.com/numbers/divisibility-rule-of-11/