Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 990 · 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.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
2. 2.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a loud opinion (d) a rumour
3. 3.🧩 A box has 6 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 11 (b) not enough info (c) 35 (d) 30
4. 4.🧩 Meera bought 3 pens and a bag for ₹135 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) not enough info (c) ₹132 (d) ₹135
5. 5.🧩 Aarav bought 3 balls and a cap for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) not enough info (c) ₹135 (d) ₹132
6. 6.🧩 Diya is 6 years old. Ananya is 2 years older than Diya. How old is Ananya? (a) not enough info (b) 9 (c) 2 (d) 8
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.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
9. 9.🧩 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
10. 10.🧩 Saanvi bought 6 balls and a bag for ₹350 in all. Each ball cost the same. What did one ball cost? (a) ₹344 (b) ₹350 (c) not enough info (d) ₹58
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
12. 12.🧩 A box has 3 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 24 (b) 9 (c) 18 (d) not enough info
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
14. 14.🥭 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) yes, mangoes match (d) no, check more
15. 15.🧩 Rohan is 12 years old. Tara is 6 years older than Rohan. How old is Tara? (a) 19 (b) 6 (c) not enough info (d) 18
16. 16.🧩 Rohan is 12 years old. Arjun is older than Rohan. How old is Arjun? (a) 14 (b) 13 (c) not enough info (d) 17
17. 17.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
19. 19.🧩 Diya bought 5 pens and a lunch box for ₹190 in all. Each pen cost the same. What did one pen cost? (a) ₹185 (b) not enough info (c) ₹190 (d) ₹38
20. 20.🧩 Rohan is 6 years old. Saanvi is older than Rohan. How old is Saanvi? (a) 8 (b) not enough info (c) 11 (d) 7
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
23. 23.🧩 Ishaan is 8 years old. Aarav is older than Ishaan. How old is Aarav? (a) 10 (b) 13 (c) 9 (d) not enough info
24. 24.🧩 Aarav bought 4 balls and a water bottle for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹37 (b) ₹150 (c) ₹146 (d) not enough info
25. 25.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
26. 26.🧩 Kabir is 6 years old. Saanvi is 9 years older than Kabir. How old is Saanvi? (a) 16 (b) not enough info (c) 15 (d) 9
27. 27.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) not enough info (c) 60 (d) 6
28. 28.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
29. 29.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
30. 30.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 9 (b) 90 (c) not enough info (d) 18
31. 31.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Arjun bought 2 mangoes for ₹70 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹35 (c) not enough info (d) ₹70
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
34. 34.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 36 (b) 42 (c) not enough info (d) 12
35. 35.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
36. 36.🧩 A box has 4 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 20 (b) 25 (c) 9 (d) not enough info
37. 37.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
38. 38.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 8 PM (c) 5 PM (d) not enough info
39. 39.🧩 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
40. 40.🧩 Kabir bought 4 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹10 (c) ₹40 (d) not enough info

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