...are ciphers, or express a number divisible by 8. Thus, 2000, 3168, 5256, etc., are divisible by 8. 7. By 9, if the sum of the digits is divisible by 9. Thus, 63, 135, 342, etc., are divisible by 9. 8. By 10, if the unit figure is 0. 9. By 25, if the two...

...numbers divisible by 9? Divide by 9 other numbers the sum of whose digits is divisible by 9. A number is divisible by 9, if the sum of the digits is divisible by 9. 5. State which of the following numbers are divisible by 2; by 5; by 3; by 9 : 6. 10 9. 135 12. 400...

...is divisible by 2 and 3. 6. By 8 if the three right hand digits express a number divisible by 8. 7. By 9 if the sum of the digits is divisible by 9. 8. By 10 if the number ends in 0. 9. By 12 if the number is divisible by 3 and 4. 10. By 15 if the...

...divisible by 2. By 3, if the sum of the digits is divisible by 3. By 5, if the units' figure is 0 or 5. By 9, if the sum of the digits is divisible by 9. Find the prime factors of 132. 9} 1 49 What prime number will divide 132 ? Dividing by 2, ¿ До-j...

...rule (2) applies. (6) A number is divisible by 8 if the last 3 digits are divisible by 8. (7) A number is divisible by 9 if the sum of the digits is divisible by 9. Multiples and Factors.—Their Importance.—A knowledge of multiples is necessary in all reductions...

...2743: 2000 = 2 x 999 + 2 700 = 7 x 99 + 7 40 = 4 x 9 + 4 _3 = 3 2743 = (multiples of 9)+ 2 + 7 + 4 + 3 14. In Ex. 13 show that 2743 is divisible by 9 if...mentally which of these products are incorrect : 15. 687 x 87,147= 52,985,379. 18. II 3 = 1341. 16. 22.2 x 307.05 = 6836.51. 19. 114 = 14,641. Check of...

...any even number divisible by 3; by 8: if the number formed by the last 3 digits is divisible by 8; by 9; if the sum of the digits is divisible by 9 6. When x is 1 more than y. For example, if x — 7 and y = 6, then x + y = 1 3 and x - y = I ; and...

...related because 3x3-9. The divisibility rules for 3 and 9 are also similar to one another. A number is divisible by 9 if the sum of the digits is divisible by 9. In relation to digital roots a number is divisible by 9 if its digital root is 9. The digital root...

...Multiply out the /I <mj^^" ~t brackets and then simplify. *3 Prove this statement. Any three-digit number is divisible by 9 if the sum of the digits is divisible by 9. Review Carlota noticed that all of the two-digit numbers where the tens digit is equal to the units...

...because the number composed by the last three digits, 544, is divisible by 8. Divisibility by 9: A number is divisible by 9 if the sum of the digits is divisible by 9. Example: 1,264,873,920,921 is divisible by 9 because the sum of the digits is 1 + 2 + 6 + 4 + 8 + 7...