To make the 6-digit. 15abc6 divisible by 36 and get the smallest quotient, ask the original 6-digit ()
Because 36 = 4 × 9, and 4 and 9 are coprime, this six digit number should be divisible by both 4 and 9. If 6-digit. 15abc6 can be divisible by 4, then. C6 can be divisible by 4, so C can take 1, 3, 5, 7, 9
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- 1. In order to make the 6-digit 15 □ □ 6 divisible by 36 and get the largest quotient, it should be filled in______ .
- 2. Please write three six digit numbers that can be divided by 7, 11 and 13 at the same time______ .
- 3. Please write three six digit numbers that can be divided by 7, 11 and 13 at the same time______ .
- 4. Please write three six digit numbers that can be divided by 7, 11 and 13 at the same time______ .
- 5. It is proved that any three digit can be written twice to get a six digit, which can be divided by 7, 11 and 13 at the same time
- 6. It is proved that any three digit can be divided by 7,11,13 at the same time
- 7. a. B and C are three different Arabic numerals. Try to determine the six digit abcabc so that it can be divided by eleven natural numbers from 1 to 11
- 8. Six digit 2008 () () can be divided by 15, so there are () such six digits
- 9. Write a three digit number and then write it again to form a six digit number in the form of abcabc. This six digit number can be divided by three continuous prime numbers____ Write a three digit number and then write it again to form a six digit number in the form of abcabc. This six digit number can be divided by three consecutive prime numbers__________________________________
- 10. English abbreviations BC, DJ, ztv, SOS, AC, CBA, PC, PM, DNA, PhD, VOA, USA, am, PRs, UK, GMT,
- 11. To design a program, input a three digit ABC from the keyboard, and then input the numbers from right to left in turn, that is, output another three digit CBA I'm a novice on Baidu, I don't have so many points. Please help me solve the problem even if I offer a low reward Sorry, I didn't make it clear. I'm looking forward to seeing your answers
- 12. As shown in the figure, D is a point on the side BC of △ ABC, and ∠ 1 = 2, ∠ 3 = 4, ∠ BAC = 63 ° to find the degree of ∠ DAC?
- 13. As shown in the figure, it is known that in △ ABC, D is a point on the edge of BC, ∠ 1 = ∠ B, ∠ 2 = ∠ C, ∠ BAC = 78 ° to find the degree of ∠ DAC
- 14. Through the vertex a of △ ABC, make AE ⊥ AB, ad ⊥ AC, make AE = AB, ad = AC, BD and CE intersect at point O. prove: (1) EC = BD (2) EC ⊥ BD
- 15. In the triangle ABC, point D is on the edge AC, DB = BC, point E is the midpoint of CD, point F is the midpoint of AB, passing through point a as Ag parallel EF, The extension line of intersection be is at point g. try to explain that the triangle Abe is equal to the triangle age
- 16. As shown in the figure, it is known that ﹥ 1 = ﹥ ABC = ﹥ ADC, ﹥ 3 = ﹥ 5, ﹥ 2 = ﹥ 4, ﹥ ABC + ﹥ BCD = 180 degree Ten questions on 10 pages of tiantiantong Modu -- (1) Verify AD / / BC (2) Verification AB / / CD
- 17. The radius of fixed ⊙ o is 4cm, and the radius of moving ⊙ P is 1cm. If moving ⊙ P is always circumtangent to fixed ⊙ o, what is the distance between point P and point o? What kind of line can point P move on?
- 18. It is known that the radius of circle O is 1 and the chord is 0 CA.CB If the length of root sign is 2 and root sign is 3, then the angle ACB = how many degrees? Thank you It is known that the radius of the circle O is OC = 1 and the chord ca. If the length of CB is root 2 and root 3 respectively, how many degrees is the angle ACB?
- 19. As shown in the figure, a and B are separated by the lake water, and Ca = 50m, CB = 60m, ∠ ACB = 145 ° are measured from C. draw the figure as shown in the figure with 1cm representing 10m (i.e. 1:1000 scale). Measure the length of AB (accurate to 1mm), and then convert the actual distance between a and B
- 20. It is known that D.E.F in △ ABC is respectively the midpoint of three sides, and the sum of the perimeter of △ ABC and △ DEF is equal to 18cm, then the perimeter of △ DEF is?