Question
Which number sequence is formed by counting the number of lines in each shape in the sequence of complete graphs?
✓
Answer
Sequence of triangular numbers i.e. $1,3,6,10,15,21, ....$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Determine the largest $3-$digit number exactly divisible by $8, 10$ and $12.$
→Express the following as mixed fracton: $\frac{20}3$
→Reduce the following fractions to the lowest terms:$\frac{161}{207}$
→Solve the following equation by trial and error method: $3y = 36$
→Find the diameter of a wheel whose circumference is $176\ cm.$
→The traffic lights at three different road crossings change after every $48$ seconds, $72$ seconds and $108$ seconds respectively. If they change simultaneously at $7 a.m$., at what time will they change simultaneously again?
→Compare the fractions given below: $\frac{11}{12},\frac{13}{15}$
→A magic square is an array of numbers having the same number of rows and columns and the sum of numbers in each row, column or diagonal being the same. Fill in the blank cells of the following magic square:
Pair of numbers, werify that their product $= (HCF \times LCM)$
$490, 1155$
→$490, 1155$
With the same centre $O$, draw two circles of radii $4\ cm$ and $2.5\ cm.$
→