Question 1

a/ Find the remainder when 7100 is divided by 25

b/ Find the remainder when 2603 * 3201 is divided by 25

c/ Hence show that 29 * 7100 + 54 * 2603 * 3201 is divisible by 25

Question 2

In a triangle ABC, BAC = 35°. D is a point on AB such that AD=BC and ADC=110°. E is a point on AC such that BE=DC. What is the size of ABE?

Could you please help with these problems, I’ve tried myself, but can only get so far. Any help is helpful.