Ôn tập toán 6
Các câu hỏi tương tự
If the sum of two 2-digit numbers ab and ac and a 1-digit number d is 30, and d>b>c>A . Find ab
Exer 1: Given two natural numbers whose sum are 78293. The bigger number where 5 is the units digit and 2 is hundred digit. If we clean these digits then we obtain a number which equals the smaller number. Find two natural numbers.
Exer 2: Prove that: If x, y in N and x + 2y divisible by 5 then 3x - 4y divisibles by 5.
Exer 3: Given that 2x + 5y ⋮ 7. Prove that 4x + 3y ⋮ 7.
Đọc tiếp
Exer 1: Given two natural numbers whose sum are 78293. The bigger number where 5 is the units digit and 2 is hundred digit. If we clean these digits then we obtain a number which equals the smaller number. Find two natural numbers.
Exer 2: Prove that: If x, y \(\in\) N and x + 2y divisible by 5 then 3x - 4y divisibles by 5.
Exer 3: Given that 2x + 5y \(⋮\) 7. Prove that 4x + 3y \(⋮\) 7.
Exer 1: Find digit a such that n overline{aaaaa24} divisibles by 8 and 9.
Exer 2: Prove that number:
A (n+2014)(n+2015)(n+2016) is a multiple of 6; where every n in N.
Exer 3: Given n 101998 - 4.
a, Does n divisibles by 3?
b, Does n divisibles by 9?
And why?
Đọc tiếp
Exer 1: Find digit a such that n = \(\overline{aaaaa24}\) divisibles by 8 and 9.
Exer 2: Prove that number:
A = (n+2014)(n+2015)(n+2016) is a multiple of 6; where every n \(\in\) N.
Exer 3: Given n = 101998 - 4.
a, Does n divisibles by 3?
b, Does n divisibles by 9?
And why?
how many numbers from to 1 and 100 are not divisible by 3
mk gấp lắm các bn làm nhanh nha
Given A= {x\(\in\) N |x.3=4}
How many elements are there in the set A?
how many numbers between 20 and 30 have 4 factors
Given A= { 3,5,7,...,99}.How many elements are there in the set A?
how many numbers from 1 to 1000 are common multiple of 5 and 6
Ai làm nhanh mà đúng thì mk tick cho
A= {x εN | x . 2= 4}.
How many elements are there in set A?