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Prime numbers
100

Numbers divisible only by 1 and itself are called ........ numbers.

Prime

100

Prime factors of 20?

2 and 5

100

What is the sum of the smallest two-digit multiple of 3 and the largest two-digit multiple of 2?

110

100

The rule for this number says that if the last digit of a number is even, it is divisible.

Rule:2

100

The smallest prime number.

2

200

A51 is 3 digit number. If it is divisible by 3 then minumum value of A is .......

3

200

How many prime factors does the number 210 have?

4

200

What is the smallest three-digit number that is a multiple of 17?

102

200

The four-digit number 413b is an integer with different digits that is exactly divisible by 3. What is b?

7

200

The smallest 3 digit prime number.

101

300

A and B are two-digit consecutive numbers. What is the greatest common factor of these numbers?

1

300

2-digit number between 60 and 70 with 3 prime factors?

66

300

The number ABC is a 3-digit number with the largest multiple of 4. What is the remainder of ABC divided by 5?

1

300

If the remainder of the three-digit number 43b divided by 10 is 5, is this number divisible by 9?

No

300

The biggest 3 digit prime number

997

400

4-digit largest prime number

9973

400

The only factor of 108 that is not listed: 1,2,3,4,6,12,18,27,36,54,108

9

400

ABC is the largest 3-digit number that is a multiple of 6 and 8. How much less than 1000 is this number?

40

400

84265B is an odd number divisible by 5. Is this number divisible by 3?

Yes

400

What is the sum of the smallest 2-digit prime number and the largest 2-digit prime number?

108

500

8A265B is an even number divisible by 5.If this number is divisible by 9 then how many digits does 10A has?

7

500

If "n" is the number of positive factors of 80 then what is the value of n5 -1

99999

500

ABC is a three-digit number with the largest multiple of 8. What is the remainder of this number divided by 9?

2

500

abc is an even number divisible by 6. How many abc numbers are there from 100 to 120 (including 100 and 120)?

4

500

Prime numbers that can be written as "2n - 1"  are called “Mersenne” primes. According to this, what is the sum of the three smallest Mersenne primes?

41