Tuesday, June 9 — Day 17

Final week, day 1. Four days left. No new topics — we close gaps.

The deal today

• 9:30 to 12:00 study, with two 20-minute breaks.
• 22 questions. A and B share nothing; B is the harder set.
• Phones off 9:30 to 1:00. The last hour is yours, no screen.

Focus today

Math — breakdowns and the messy fractions

• Five two-digit multiplications. The method is right; the slip is the final addition. Slow down there.
• GCF, LCM, and all four fraction operations. Answers won't come out clean — reduce at the end.

Science — valence + atomic structure

• Valence: B → 3, C → 4, F → 7. Read the group number.
• Protons = atomic number = the element's identity. Electrons = protons (neutral atom). Neutrons come from the most common isotope.

Peace — the dates that still cost you

• Westphalia, 1648. Versailles, 1919. UN Charter, 1945. Geneva, 1949.

Today's exam (22 questions)

• 11 math (5 two-digit multiplication, GCF, LCM, all four fraction ops)
• 7 science (valence + protons/neutrons/electrons)
• 4 history (the four treaties above)
• No evolution — you've mastered it.

Help links

• Atomic structure & periodic table
• Valence electrons
• Multiplication table & breakdown
• Peace accords
• GCF · LCM