find HCF by prime factorisation method 1)42,63,90
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9 types of contraception you can use to prevent pregnancy (with pictures!)
The Condom. ...
The Oral Contraceptive Pill. ...
Intrauterine Device (IUD) ...
The Contraceptive Implant. ...
The Contraceptive Injection. ...
Emergency Contraception Pill (The 'Morning After' Pill) ...
Contraceptive Ring. ...
Diaphragm.
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