Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 642 · 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.🧩 Aarav is 8 years old. Arjun is 3 years older than Aarav. How old is Arjun? (a) 12 (b) 11 (c) not enough info (d) 3
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
3. 3.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
4. 4.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Kabir bought 5 pens and a bag for ₹330 in all. Each pen cost the same. What did one pen cost? (a) ₹66 (b) ₹325 (c) ₹330 (d) not enough info
7. 7.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
11. 11.🧩 Kabir bought 3 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹25 (c) not enough info (d) ₹20
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
14. 14.🧩 Diya is 10 years old. Ananya is 8 years older than Diya. How old is Ananya? (a) 18 (b) not enough info (c) 8 (d) 19
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) no, check more (d) yes, mangoes match
17. 17.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
18. 18.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
19. 19.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 6 PM (d) 10 PM
20. 20.🧩 Nisha bought 6 balls and a water bottle for ₹280 in all. Each ball cost the same. What did one ball cost? (a) ₹280 (b) ₹274 (c) ₹46 (d) not enough info
21. 21.🧩 Diya is 10 years old. Nisha is older than Diya. How old is Nisha? (a) not enough info (b) 11 (c) 12 (d) 15
22. 22.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
23. 23.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
24. 24.🧩 Ananya bought 4 pens and a cap for ₹230 in all. Each pen cost the same. What did one pen cost? (a) ₹226 (b) not enough info (c) ₹57 (d) ₹230
25. 25.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 24 (c) 30 (d) 10
26. 26.🧩 Aarav bought 3 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹75 (c) not enough info (d) ₹25
27. 27.🧩 Tara bought 3 balls and a lunch box for ₹225 in all. Each ball cost the same. What did one ball cost? (a) ₹225 (b) ₹75 (c) not enough info (d) ₹222
28. 28.🧩 Diya is 7 years old. Kabir is 3 years older than Diya. How old is Kabir? (a) 11 (b) 3 (c) not enough info (d) 10
29. 29.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
31. 31.🧩 Tara is 7 years old. Diya is 8 years older than Tara. How old is Diya? (a) 8 (b) not enough info (c) 16 (d) 15
32. 32.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Ananya bought 4 kites and a cap for ₹320 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) ₹320 (c) ₹316 (d) not enough info
34. 34.🧩 A box has 7 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 32 (b) 11 (c) not enough info (d) 28
35. 35.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
36. 36.🧩 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
37. 37.🧩 Tara bought 3 mangoes and a water bottle for ₹135 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) not enough info (c) ₹132 (d) ₹135
38. 38.🧩 Ananya bought 3 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹55 (c) ₹50 (d) ₹150
39. 39.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
40. 40.🧩 Saanvi bought 6 balls and a lunch box for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹234 (b) not enough info (c) ₹240 (d) ₹40

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