how many numbers in form of abcd in which ab=c

Question

how many numbers in form of abcd in which a>b=c

yaswanth · Answer

IF A=1 THEN B=C=0;D=0-9 10 NUMBERS IF A=2 THEN B=C=0,1;D=0-9 20 NUMBERS IF A=3 THEN B=C=0-2;D=0-9 30 NUMBERS IF A=4 THEN B=C=0-3;D=0-9 40 NUMBERS IF A=5 THEN B=C=0-4;D=0-9 50 NUMBERS IF A=6 60 NUMBERS IF A=7 70 NUMBERS IF A=8 80 NUMBERS IF A=9 90 NUMBERS SO,TOTAL NUMBERS=10+20+30+40+50+60+70+80+90=450

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how many numbers in form of abcd in which a>b=c

how many numbers in form of abcd in which a>b=c

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