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Bài 1:
Program HOC24;
var i,n,d : byte;
t: integer;
begin
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,' : '); readln(a[i]);
end;
for i:=1 to n do if (a[i] mod 3=0) and (a[i] mod 5=0) then
begin
d:=d+1;
t:=t+a[i];
end;
writeln('Co ',d,' phan tu la boi cua 3 va 5');
write('Tong la: ',t);
readln
end.
Bài 2:
Program HOC24;
var i,n,k : byte;
begin
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,' : '); readln(a[i]);
end;
write('Nhap k: '); readln(k);
for i:=1 to n do if a[i]=k then d:=d+1;
writeln('Co ',d,' phan tu bang ',k);
Write('Cac chi so do la: ');
for i:=1 to n do if a[i]=k then write(i,' ');
readln
end.
Program bt_3;
Uses crt;
Var a: array[1..100] of integer;
Dem, Tong, n, i: integer;
Begin
Clrscr;
Writeln(‘nhap so phan tu, n=’);
Readln (n);
for i := 1 to n do
begin
writeln(‘nhap gia trij phan tu thu ’,i,’ =’);
readln(a[i]);
end;
Dem:=0;
Tong:=0;
For i:=1 to n do
If (a[i] mod 2 = 0) and (a[i] mod 3 = 0) then
begin
Dem:= Dem+1;
Tong:= Tong+a[i];
end;
writeln(‘Dem la:’,Dem);
Writeln(‘Tong la:’,Tong);
Readln
End.
Program bt_3;
Uses crt;
Var a: array[1..100] of integer;
Dem, Tong, n, i: integer;
Begin
Clrscr;
Writeln(‘nhap so phan tu, n=’);
Readln (n);
for i := 1 to n do
begin
writeln(‘nhap gia trij phan tu thu ’,i,’ =’);
readln(a[i]);
end;
Dem:=0;
Tong:=0;
For i:=1 to n do
If (a[i] mod 2 = 1) and (a[i] mod 3 = 0) then
begin
Dem:= Dem+1;
Tong:= Tong+a[i];
end;
writeln(‘Dem la:’,Dem);
Writeln(‘Tong la:’,Tong);
Readln
End.
Program bt_3;
Uses crt;
Var a: array[1..100] of integer;
Dem, Tong, n, i: integer;
Begin
Clrscr;
Writeln(‘nhap so phan tu, n=’);
Readln (n);
for i := 1 to n do
begin
writeln(‘nhap gia trij phan tu thu ’,i,’ =’);
readln(a[i]);
end;
Dem:=0;
Tong:=0;
For i:=1 to n do
If (a[i] mod 2 = 0) and (a[i] mod 5 = 0) then
begin
Dem:= Dem+1;
Tong:= Tong+a[i];
end;
writeln(‘Dem la:’,Dem);
Writeln(‘Tong la:’,Tong);
Readln
End.
Program bt_3;
Uses crt;
Var a: array[1..100] of integer;
Dem, Tong, n, i: integer;
Begin
Clrscr;
Writeln(‘nhap so phan tu, n=’);
Readln (n);
for i := 1 to n do
begin
writeln(‘nhap gia trij phan tu thu ’,i,’ =’);
readln(a[i]);
end;
Dem:=0;
Tong:=0;
For i:=1 to n do
If (a[i] mod 2 = 1) and (a[i] mod 5 = 0) then
begin
Dem:= Dem+1;
Tong:= Tong+a[i];
end;
writeln(‘Dem la:’,Dem);
Writeln(‘Tong la:’,Tong);
Readln
End.
Program HOC24;
var d,i,n: integer;
a: array[1..1000] of integer;
t: longint;
function nt(x: longint): boolean;
var j: longint;
begin
nt:=true;
if (x=2) or (x=3) then exit;
nt:=false;
if (x=1) or (x mod 2=0) or (x mod 3=0) then exit;
j:=5;
while j<=trunc(sqrt(x)) do
begin
if (x mod j=0) or (x mod (j+2)=0) then exit;
j:=j+6;
end;
nt:=true;
end;
begin
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
d:=0; t:=0;
for i:=1 to n do
if nt(a[i]) then
begin
d:=d+1;
t:=t+a[i];
end;
writeln('Co ',d,' so nguyen to trong day');
write('Tong cac so nguyen to trong day la: ',t);
readln
end.
uses crt;
var a:array[1..1000]of integer;
i,n,dem,t,j,kt:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
dem:=0;
t:=0;
for i:=1 to n do
if a[i]>1 then
begin
kt:=0;
for j:=2 to a[i]-1 do
if a[i] mod j=0 then kt:=1;
if kt=0 then
begin
inc(dem);
t:=t+a[i];
end;
end;
writeln('So luong so nguyen to la: ',dem);
writeln('Tong cac so nguyen to la: ',t);
readln;
end.
Bài 1:
#include <bits/stdc++.h>
using namespace std;
long long i,n,x,t;
int main()
{
cin>>n;
t=0;
for (i=1; i<=n; i++)
{
cin>>x;
if (x%15==0) t=t+x;
}
cout<<t;
return 0;
}
Chọn đáp án A
A. Đây là chương trình đếm các số nguyên trong khoảng từ 1 đến 1000 là bội số của 3