Find the sum of all integers from 40 to 120, inclusive.
Correct answer(s):
- 6480
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Find the sum of all integers from 25 to 75, inclusive.
Correct answer(s):
- 2550
Find the sum of all integers from 1 to 100, inclusive.
Correct answer(s):
- 5050
Find the sum of all integers from 1 to 50, inclusive.
Correct answer(s):
- 1275
Replace x in 35×82 so that the number is divisible by 11.
Correct answer(s):
- 8
Replace x in 91×47 so that the number is divisible by 11.
Correct answer(s):
- 0
Replace x in 83×61 so that the number is divisible by 11.
Correct answer(s):
- 0
Replace x in 72×94 so that the number is divisible by 11.
Correct answer(s):
- 0
Replace x in 54×23 so that the number is divisible by 11.
Correct answer(s):
- 9
Replace x in 81×26 so that the number is divisible by 9.
Correct answer(s):
- 1
Replace x in 26×73 so that the number is divisible by 9.
Correct answer(s):
- 9
- 0
Replace x in 58×41 so that the number is divisible by 9.
Correct answer(s):
- 9
- 0
Replace x in 93×15 so that the number is divisible by 9.
Correct answer(s):
- 9
- 0
Replace x in 74×52 so that the number is divisible by 9.
Correct answer(s):
- 9
- 0
Find the units digit of 19^411.
Correct answer(s):
- 9
Find the units digit of 17^319.
Correct answer(s):
- 3
Find the units digit of 13^222.
Correct answer(s):
- 9
Find the units digit of 2^517.
Correct answer(s):
- 2
Find the units digit of 4^135.
Correct answer(s):
- 4
Find the units digit of 8^88.
Correct answer(s):
- 6