Question
Complete the number pattern.
$3, 6, 9, 12, 15$ __________,__________,__________,__________
$3, 6, 9, 12, 15$ __________,__________,__________,__________
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| $T$ | $O$ | |
| $7$ | $3$ | |
| $-$ | $4$ | $6$ |



