Các câu hỏi tương tự
Khong tinh toan hay cho biet cac so sau la nguyen to hay hop so :
a) 191 . 3 + 240
b) 10^9 + 2
c) 91 . 13 - 29 . 13
em hay cho biet co 2 so nguyen to cung nhau nao ma ca 2 deu la hop so khong
p=2011*2010*2013*2014+1.ko tinh tich hay cho biet P la nguyen to hay hop so
cho p la so nguyen to lon hon 3. Biet 8p+1 va p deu la so nguyen to (p lon hon 3).Hoi p+100 la so nguyen to hay hop so
11111 co phai la so nguyen to khong .neu la hop so thi hay phan tich ra thua so nguyen to
cho biet 102004 - 1 la hop so hay so nguyen to
1/. X36y chia het cho 9, biet y là so nguyen to nho nhat?
2/. 6x3y chia het cho 3 , khi chia 5 dư 1
3/. x63y chia het cho 3, biet x khong phai la so nguyen to, cung khong phai la hop so
1) Mot so nguyen to chia cho 30 duoc so du la r.Tim r,biet r khong phai la so nguyen to.
2) Chung minh rang:
a/ So 17 khong viet duoc tong 3 hop so khong bang nhau.
b/Moi so le lon hon 17 deu viet duoc duoi dang 3 hop so khac nhau.
khong thuc hien phep tinh , cho biet cac tong hoac hieu sau day la nguyen to hay hop so
32+3.17+3.433; 7+72+73+74+75 ; 46-30+2002 ; 3.4.5.6.7+7.8.9.10