90 has an infinite number of multiples.
Multiples of 9 up to 100 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99. Multiples of 10 up to 100 are 10, 20, 30, 40, 50, 60, 70, 80. 90, 100. The only common multiple up to 100 of 9 and 10 is 90.
If half of the sum is 90 then the full sum must be 180. The three consecutive multiples of 10 which add up to 180 are 50, 60 and 70.
7,14,21,28,35,42,49,56,63,70, 77, 84.. :D Its SOOO Easy!
There are (99 - 9) = 90 2-digit numbers.13 of them are multiples of 7.The probability is 13/90 = 14.4% (rounded)
These are the first 90 multiples of 7:714212835424956637077849198105112119126133140147154161168175182189196203210217224231238245152159266273280287294301308315322329336343350357364371378385392399406413420427434441448455462469476483490497504511518525532539546553560567574581588595602609616623630
18,36,54,72,90
15*6 = 90 and 15*7 = 105 so there are 6 multiples.
91, 98, 105, 112, 119
Just 84.
90 has an infinite number of multiples.
Just 90.
Common multiples of 9 and 10 are all of the multiples of 90.
Multiples of 9 up to 100 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99. Multiples of 10 up to 100 are 10, 20, 30, 40, 50, 60, 70, 80. 90, 100. The only common multiple up to 100 of 9 and 10 is 90.
30, 60, 90
Multiples of 3: 123, 45, 6, 78, and 90 Multiples of 7: 7, 14, 28, 56, and 903 Primes: 5, 23, 41, 67, and 809
If half of the sum is 90 then the full sum must be 180. The three consecutive multiples of 10 which add up to 180 are 50, 60 and 70.