Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 905 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
2. 2.🧩 Saanvi bought 2 balls and a lunch box for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹70 (b) not enough info (c) ₹138 (d) ₹140
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
6. 6.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Rohan bought 4 pens and a bag for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹32 (b) not enough info (c) ₹126 (d) ₹130
8. 8.🧩 A box has 8 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 15 (b) not enough info (c) 56 (d) 63
9. 9.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
10. 10.🧩 Arjun is 11 years old. Rohan is 8 years older than Arjun. How old is Rohan? (a) 19 (b) 8 (c) not enough info (d) 20
11. 11.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Saanvi is 10 years old. Ananya is 4 years older than Saanvi. How old is Ananya? (a) not enough info (b) 4 (c) 15 (d) 14
14. 14.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
15. 15.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
16. 16.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) not enough info (b) 6 (c) 60 (d) 12
17. 17.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
18. 18.🧩 Saanvi bought 4 markers and a bag for ₹180 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹176 (c) ₹180 (d) ₹45
19. 19.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
20. 20.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
21. 21.🧩 Nisha bought 4 kites and a cap for ₹260 in all. Each kite cost the same. What did one kite cost? (a) ₹65 (b) ₹260 (c) not enough info (d) ₹256
22. 22.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Ishaan is 8 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) not enough info (b) 10 (c) 13 (d) 9
25. 25.🧩 Tara is 6 years old. Kabir is older than Tara. How old is Kabir? (a) 7 (b) 11 (c) 8 (d) not enough info
26. 26.🧩 Ananya bought 2 kites and a lunch box for ₹120 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹60 (c) ₹120 (d) ₹118
27. 27.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Aarav bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹20 (c) not enough info (d) ₹15
31. 31.🧩 Ananya is 9 years old. Nisha is older than Ananya. How old is Nisha? (a) 14 (b) 11 (c) 10 (d) not enough info
32. 32.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
33. 33.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 80 (b) not enough info (c) 16 (d) 8
34. 34.🧩 Nisha bought 6 balls and a water bottle for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹240 (b) not enough info (c) ₹40 (d) ₹234
35. 35.🧩 Meera bought 2 markers and a lunch box for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹178 (c) ₹180 (d) not enough info
36. 36.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
37. 37.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
38. 38.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
39. 39.🧩 A box has 8 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 56 (b) 63 (c) not enough info (d) 15
40. 40.🧩 Aarav is 12 years old. Meera is 7 years older than Aarav. How old is Meera? (a) 20 (b) 7 (c) 19 (d) not enough info

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